Śrāddha-kalpa: Amarakantaka–Tīrtha-Māhātmya and Akṣaya Pitṛ-Tarpaṇa
श्राद्धं तत्र सदाक्षय्यं दाता स्वर्गे च मोदते / श्राद्धं सुंदनिसुंदे च देयं पापनिषू दनम्
śrāddhaṃ tatra sadākṣayyaṃ dātā svarge ca modate / śrāddhaṃ suṃdanisuṃde ca deyaṃ pāpaniṣū danam
The Śrāddha performed there is ever imperishable, and the giver rejoices in heaven. In the place/episode of Sunda and Nisunda too, one should offer Śrāddha, for it destroys sin.